/*
 * dds.h
 *
 * This header defines constants and structures that are useful when parsing 
 * DDS files.  DDS files were originally designed to use several structures
 * and constants that are native to DirectDraw and are defined in ddraw.h,
 * such as DDSURFACEDESC2 and DDSCAPS2.  This file defines similar 
 * (compatible) constants and structures so that one can use DDS files 
 * without needing to include ddraw.h.
 */

#ifndef _DDS_H_
#define _DDS_H_

typedef struct DDS_PIXELFORMAT DDS_PIXELFORMAT;
struct DDS_PIXELFORMAT
{
    DWORD dwSize;
    DWORD dwFlags;
    DWORD dwFourCC;
    DWORD dwRGBBitCount;
    DWORD dwRBitMask;
    DWORD dwGBitMask;
    DWORD dwBBitMask;
    DWORD dwABitMask;
};

#ifndef MAKEFOURCC

#define MAKEFOURCC(ch0, ch1, ch2, ch3) \
    ((FOURCC)(BYTE)(ch0) | ((FOURCC)(BYTE)(ch1) << 8) |   \
    ((FOURCC)(BYTE)(ch2) << 16) | ((FOURCC)(BYTE)(ch3) << 24 ))

#endif /* MAKEFOURCC */

#define DDS_FOURCC      0x00000004  /* DDPF_FOURCC */
#define DDS_RGB         0x00000040  /* DDPF_RGB */
#define DDS_RGBA        0x00000041  /* DDPF_RGB | DDPF_ALPHAPIXELS */
#define DDS_ALPHAPIXELS 0x00000001  /* DDPF_ALPHAPIXELS */

const DDS_PIXELFORMAT DDSPF_DXT1 =
    { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC('D','X','T','1'), 0, 0, 0, 0, 0 };

const DDS_PIXELFORMAT DDSPF_DXT2 =
    { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC('D','X','T','2'), 0, 0, 0, 0, 0 };

const DDS_PIXELFORMAT DDSPF_DXT3 =
    { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC('D','X','T','3'), 0, 0, 0, 0, 0 };

const DDS_PIXELFORMAT DDSPF_DXT4 =
    { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC('D','X','T','4'), 0, 0, 0, 0, 0 };

const DDS_PIXELFORMAT DDSPF_DXT5 =
    { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC('D','X','T','5'), 0, 0, 0, 0, 0 };

const DDS_PIXELFORMAT DDSPF_A8R8G8B8 =
    { sizeof(DDS_PIXELFORMAT), DDS_RGBA, 0, 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000 };

const DDS_PIXELFORMAT DDSPF_A1R5G5B5 =
    { sizeof(DDS_PIXELFORMAT), DDS_RGBA, 0, 16, 0x00007c00, 0x000003e0, 0x0000001f, 0x00008000 };

const DDS_PIXELFORMAT DDSPF_A4R4G4B4 =
    { sizeof(DDS_PIXELFORMAT), DDS_RGBA, 0, 16, 0x0000f000, 0x000000f0, 0x0000000f, 0x0000f000 };

const DDS_PIXELFORMAT DDSPF_R8G8B8 =
    { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 24, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x00000000 };

const DDS_PIXELFORMAT DDSPF_R5G6B5 =
    { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 16, 0x0000f800, 0x000007e0, 0x0000001f, 0x00000000 };

#define DDS_HEADER_FLAGS_TEXTURE    0x00001007  /* DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT */
#define DDS_HEADER_FLAGS_MIPMAP     0x00020000  /* DDSD_MIPMAPCOUNT */
#define DDS_HEADER_FLAGS_VOLUME     0x00800000  /* DDSD_DEPTH */
#define DDS_HEADER_FLAGS_PITCH      0x00000008  /* DDSD_PITCH */
#define DDS_HEADER_FLAGS_LINEARSIZE 0x00080000  /* DDSD_LINEARSIZE */

#define DDS_SURFACE_FLAGS_TEXTURE 0x00001000 /* DDSCAPS_TEXTURE */
#define DDS_SURFACE_FLAGS_MIPMAP  0x00400008 /* DDSCAPS_COMPLEX | DDSCAPS_MIPMAP */
#define DDS_SURFACE_FLAGS_CUBEMAP 0x00000008 /* DDSCAPS_COMPLEX */

#define DDS_CUBEMAP_POSITIVEX 0x00000600 /* DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEX */
#define DDS_CUBEMAP_NEGATIVEX 0x00000a00 /* DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEX */
#define DDS_CUBEMAP_POSITIVEY 0x00001200 /* DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEY */
#define DDS_CUBEMAP_NEGATIVEY 0x00002200 /* DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEY */
#define DDS_CUBEMAP_POSITIVEZ 0x00004200 /* DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEZ */
#define DDS_CUBEMAP_NEGATIVEZ 0x00008200 /* DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEZ */

#define DDS_CUBEMAP_ALLFACES ( DDS_CUBEMAP_POSITIVEX | DDS_CUBEMAP_NEGATIVEX |\
                               DDS_CUBEMAP_POSITIVEY | DDS_CUBEMAP_NEGATIVEY |\
                               DDS_CUBEMAP_POSITIVEZ | DDS_CUBEMAP_NEGATIVEZ )

#define DDS_FLAGS_VOLUME 0x00200000 /* DDSCAPS2_VOLUME */


typedef struct DDS_HEADER DDS_HEADER;
struct DDS_HEADER
{
    DWORD dwSize;
    DWORD dwHeaderFlags;
    DWORD dwHeight;
    DWORD dwWidth;
    DWORD dwPitchOrLinearSize;
    DWORD dwDepth; /* only if DDS_HEADER_FLAGS_VOLUME is set in dwHeaderFlags */
    DWORD dwMipMapCount;
    DWORD dwReserved1[11];
    DDS_PIXELFORMAT ddspf;
    DWORD dwSurfaceFlags;
    DWORD dwCubemapFlags;
    DWORD dwReserved2[3];
};


#endif
